And in Spider-Man: Brand New Day, Tom Holland’s hero unwittingly creates an invention that might yet prove to be the MCU’s most dangerous addition in years: the universal inhibitor chip. Throughout Destin Daniel Cretton’s movie, we see Peter Parker going through dramatic changes as his arachnoid powers evolve. (SPOILER ALERT: It’s Sadie Sink’s mutant Jean Grey — the worst-kept secret in MCU history.) Unfortunately for Peter Parker, he hasn’t seen all the Marvel movies and read all the comics where power-dampening devices cause catastrophic problems. We’ve seen the mutant inhibitor collars introduced in Chris Claremont’s X-Men #141 at the start of the classic Days Of Future Past storyline to discriminate against and neutralise mutants.